> The cafe_ccic (OLPC) camera driver uses a tasklet to move frames out of> the DMA buffers in the streaming I/O path....> > Obviously some testing is called for here. I will make an attempt to do> that testing

I've done that testing - I have an OLPC B3 unit running V2 of thetasklet->workqueue patch, and all seems well. 30 FPS to the display andno dropped frames. The tasklets/0 process is running 3-5% CPU, in casethat's interesting. For whatever reason, I see about 3% *more* idletime when running just mplayer than I did without the patch.

Consider my minor qualms withdrawn, there doesn't seem to be any troublein this area.